Course self-correcting projectile

a projectile and self-correcting technology, applied in the field of weapons, can solve the problems of affecting the point of impact and the drag reduction, and achieve the effect of increasing accuracy

Active Publication Date: 2015-08-25
UNITED STATES OF AMERICA THE AS REPRESENTED BY THE SEC OF THE ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0028]These two errors are removed by a least squares solution to the over-determined mathematic system that is created by sampling from both acceleration methods many times. Once the error is removed from the accelerometer, the fuze can adjust for velocity for the duration of the flight, and guide to its intended target with increased accuracy.

Problems solved by technology

The resulting increase and decrease in drag, affects the velocity profile of the projectile in flight, thus affecting its point of impact as it pertains to the distance from launch.

Method used

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  • Course self-correcting projectile
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  • Course self-correcting projectile

Examples

Experimental program
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Embodiment Construction

[0035]With reference to FIG. 1, the present invention provides a new fuze-equipped projectile 10 that autonomously self-corrects its course 20 toward an intended target 30, during flight. The projectile 10 can be initially, nominally aimed at the target 30, and it can self correct its flight path (or course) 20 to maintain improved accuracy relative to a conventional round. As it will be explained later, the projectile 10 uses a continuously variable surface to fine-tune the drag forces, in order to minimize, if not eliminate overshoot adjustment.

[0036]FIG. 1 illustrates various exemplary positions, A through J, of the projectile 10, along the flight path 20, starting at a launch position 40, and ending at the target 30.

[0037]With further reference to FIG. 2, in order to prevent external jamming of the guidance signals, the projectile 10 is provided with a fuze 200 that is jam resistant and GPS independent. To this end, the fuze 20 uses three distinct guidance methods (or Phases) al...

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Abstract

A new fuze that reduces projectile miss-distance to a target, by correcting for discrepancies in anticipated round velocities through its flight. As a result, the fuze-equipped projectile is nominally aimed at a target and maintains improved accuracy relative to a conventional round. The fuze adjusts for the discrepancies in velocity by using an internal electric motor to mechanically actuate a drag-altering surface on the fuze body. In order to adjust for errors in the anticipated velocity, the fuze compares its preprogrammed velocity to its actual velocity at a given point in time during flight. An anticipated velocity table versus time in flight is constantly referenced so that appropriate adjustments in velocity can be made.

Description

GOVERNMENTAL INTEREST[0001]The invention described herein may be manufactured and used by, or for the Government of the United States for governmental purposes without the payment of any royalties thereon.FIELD OF THE INVENTION[0002]The present invention generally relates to the field of munitions such as explosive projectiles. Particularly, the present invention relates to a projectile that is capable of self-correcting its course toward an intended target, during flight.BACKGROUND OF THE INVENTION[0003]Traditional long range artillery munitions have been a mainstay of warfare over the centuries. Much effort has been spent attempting to improve upon the accuracy of the projectiles. With the development of semiconductors and the integrated circuits, it has become possible to install embedded controllers to measure in-flight dynamics and to correct for inaccuracies and disturbances as integral components of the artillery rounds.[0004]In terms of accuracy, the dispersion pattern of im...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F42B15/01F42B30/00F42C19/00
CPCF42B30/006F42C19/00F42B10/50F41G7/008F41G7/36G05D1/107
Inventor ABRUZZO, BENJAMINRECCHIA, THOMASPICA, MICHAELMELLINI, MARKMARSHALL, ERICDEVENEZIA, JASONSCHUMER, SEANTHOMAS, JOHN
Owner UNITED STATES OF AMERICA THE AS REPRESENTED BY THE SEC OF THE ARMY
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